Pump valve



y 1951 H. s. BANCROFT 2,553,162

PUMP VALVE Filed Aug. 26, 1948 I N V EN TOR. flan 0rd J iawzwa/rf A 7 TO/PNEK Patented May 1 5, 1951 UNITED STATES PATENT OFFICE Claims.

This invention relates to a pump and more particularly to a pump incorporating a reciprocating and oscillating piston.

The principal object of the invention is the provision of a pump utilizing a double acting oscillating and reciprocating piston.

A further object of the invention is the provision of a simple and inexpensive pump comprising a minimum number of moving parts.

A still further object of the invention is the provision of a pump incorporating a novel reciprocating and oscillating piston slideably engaging sleeve valves at either end thereof and utilizing all of the movement of the piston in a pumping action.

A still further object of the invention is the provision of a pump which may be inexpensively manufactured of conventional materials.

The pump shown and described herein comprises a continuation in part of my patent application on Pump, Serial No. 652,634, now Patent No. 2,449,832 dated September 21, 1948.

The pump shown and described herein differs from the pump shown in my aforementioned copending patent application in that a simpler and more efficient valving mechanism is employed which is more adaptable for economic manufacture and capable of simpler machining operations. Additionally, the pump disclosed herein, while utilizing the reciprocating and oscillating piston disclosed in my aforesaid copending application, is more adaptable for double end operation wherein all movement of the reciprocating and oscillating piston is utilized in a direct pump action.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein:

, ,Figure 1 is a side elevation of the pump with parts broken away and parts in cross section.

Figure 2 is a vertical section on line 2-2 of Figure 1.

Figure 3 is a horizontal section on line 33 of Figure 1.

By referring to the drawings and Figure 1 in particular, it will be seen that the pump comprises a generally cylindrical housing Hi, the ends of which are normally closed by caps l l and I2, respectively, each of which is secured by a plurality of bolts l 3 and I4, respectively. A cylindrical bore within the body in is generally indicated by the numeral l5 and it will be observed that each end thereof is enlarged with respect to the diameter thereof, the enlarged end sections being indicated by the numeral Iii.

A piston i1 is positioned in the cylindrical bore l5 and is adapted to have a compound motion of reciprocation and oscillation imparted thereto by mechanism such as disclosed herein, consisting of a ball l8 formed integrally with a post i 9 which is afiixed to the piston I! as by threaded engagement with a drilled and tapped opening therein. The ball i8 is received in a cylindrical socket 20 formed eccentrically upon a circular plate 2| which in turn is positioned for rotation with a circular opening 22 formed in the side wall of the generally cylindrical body member l9 and intermediate the ends thereof. The circular plate 2| is formed integrally with a shaft 23 which is journaled in a combined bracket and cap 24 which in turn is secured to the body member It as by means of bolts 25. The shaft 23 may obviously be driven by any suitable power source such as an electric motor. It will be observed that the piston I l is of a uniform diameter throughout its length so as to register with the circular bore l5.

Sleeve valves comprising cup shaped members 26 are disposed one in each of the enlarged end sections I6 of the cylindrical body member, the inner diameter of the cup shaped sleeve valves 26 being the same as that of the cylindrical bore I5 heretofore referred to, so that the piston ll may move therein. The cup shaped sleeve valves 26 are oppositely disposed with respect to one another having their head portions 21 lying adjacent the caps i! and I2, respectively.

Each of the cup shaped sleeve valves 26 has an inlet port 28 therein and an outlet port 29 therein and is adapted to alternately register with inlet openings 30 and outlet openings 3|, respectively. In Figure 1 of the drawings, the the outlet port 29 is shown in registry with the outlet opening 3! while the inlet port 28 is shown out of registry with the inlet opening 38. The piston I? is moving from right to left and material being pumped is being ejected from the area within the cup shaped sleeve valve 26 through the outlet port 29 and the outlet opening 31' where it flows into a manifold 32 which may be connected with a suitable outlet pipe 33 as shown,

In order that the cup shaped sleeve valve 26 may rotate to change the registry of the inlet and outlet ports 28 and 29 with the inlet opening and outlet opening 30 and 31, respectively, a keyway 34 is formed therein and a key 35 is positioned in the piston I! in registry with the keyway 34 so that the oscillation of the piston 11 imparted thereto by the driving mechanism heretofore referred to in connection with the reciprocating movement imparted thereto will cause the cup shaped sleeve valves 26 to rotate partially to bring the outlet and inlet ports 28 and 29 therein into proper engagement with the inlet and outlet openings 3!) and 3| at the proper times.

Figure 1 of the drawings discloses the left hand end of the pump in full cross sectional detail, it being understood that the right hand end con tains a duplicate assembly and it will be observed that the manifold 32 extends beneath the body member IQ of the device so as to establish communication with the outlet opening 3| in the other end of the cylindrical body member iii. Tubular intake members 36-36 are shown in communication. with the inlet openings 30 and it will ,be obvious to those skilled in the art that if desired, the inlet openings may be manifolded in the manner of the outlet manifold 32.

By referring now to Figure 2 of the drawings. the respective positioning of the inlet and outlet openings 39 and 3f may be seen in the cylindrical body member Ill as well as the positioning of the inlet ports 23 and the outlet ports 29 of the cup shaped sleeve valves 23. The keys 35 are also shown engaging the keyways 34 formed in the cup shaped sleeve valves 26.

In Figure 3 of the drawings, a horizontal section discloses the eccentric formation of the ball l8 with respect to the circular plate 2| and the drive shaft 23 formed integrally therewith.

It will thus be seen that a double acting reciprocating and oscillating pump has been disclosed which utilizes a simple mechanism for imparting a compound oscillating and reciprocating movement. to the piston ll thereof which in turn is slideably engaged at each of its ends with the cup shaped sleeve valves 26 which are rotated for controlling the valve action by the oscillating movement of the piston l i.

It will further be seen that the pump may be simply and inexpensively formed on production equipment and that the assembled relation of the few parts is such that a minimum of wear results from their engaging operation.

Having thus described my invention, what I claim is:

1. Valve means fora pump or the like having a cylinder and a piston mounted in said cylinder and means for imparting a compound reciprocating and oscillating movement to said piston and means closing the ends of the said cylinder; said valve means comprising sleeve valves positioned in the said cylinder adjacent the ends thereof for the reception of the said piston, and means on the said piston for rotating the said sleeve valves.

2. Valve means for a pump or the like having a cylinder and a piston mounted in said cylinder and means for imparting a compound reciprocating and oscillation movement to said piston and the said cylinder having areas of enlarged diameter in its end portions; the said valve means comprising sleeve valves mounted in the said enlarged areas of the cylinder for receiving the ends of the said piston, the outermost ends of the said sleeve valves being closed, means on the said piston for imparting movement to the said sleeve valves, and means on the said cylinder for retaining the said sleeve valves in position .in the said cylinder.

3. Valve means for a pump or the like having a cylinder and a piston mounted in said cylinder and means for imparting a compound reciprocating and oscillating movement to said piston; said valve means comprising cup shaped sleeve valves carried by the cylinder at each end thereof in oppositely disposed relation, the said cup shaped sleevevalves slideably receiving the said piston, a key and keyway connection between the said piston and eaohof said cup shaped sleeve valves for imparting oscillating motion of the piston to the said valves.

4. Valve means for a pump or the like having a cylinder and a piston mounted in said cylinder and means for imparting a compound reciprocating and oscillating movement to said piston and means closing the ends of the said cylinder; said valve means comprising sleeve valves positioned in the said cylinder adjacent the ends thereof for the reception of the said piston, and means on the said piston for rotating the said sleeve valves, inlet and outlet openings in the said cylinder adjacent the ends thereof and inlet and outlet ports in the said sleeve valves for alternate registry with the said openings. 7

5. Valve means for a pump or the like having a cylinder and a piston mounted in said cylinder and means for imparting a compound reciprocating and oscillating movement to said piston and the said cylinder having areas of enlarged diameter in its end portion; said valve means comprising sleeve valves mounted in the said enlarged areas of the cylinder for receiving the ends of l the said piston, the outermost ends of the said sleeve valves being closed, means on the said piston for imparting movement to the said sleeve valves, and means on the said cylinder for retaining the said sleeve valves in position in the said cylinder, inlet and outlet openings inthe said cylinder adjacent the ends thereof and inlet and outlet ports in the said sleeve valves for alternate registry with the said openings.

HOWARD S. BANCROFT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,619,696- Bowen Mar. 1, 1927 2,015,267 Granberg Sept. 24, 1935 2,166,111 Bancroft July 18, 1939 2,449,832 Bancroft r Sept. 21, 1948 2,482,645 Berck Sept. 20, 1949 

